2026 ICD-10-CM Diagnosis Code K90.821Short bowel syndrome with colon in continuity

ICD-10-CM Codes›K00–K95›K90-K95›K90

ICD-10-CM K90.821
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

K90.821 is a billable ICD-10-CM diagnosis code for short bowel syndrome with colon in continuity. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 391 through 392. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified gastrointestinal disorders.

Code Identity

ICD-10-CM Code
K90.821
Billable Status
Yes — Valid for Submission
Code Describes
Short bowel syndrome with colon in continuity
Short Description
Short bowel syndrome with colon in continuity
Same as the full description in the CMS dataset.
Parent Code
K90.82
Short bowel syndrome

Code Classification

ChapterK00–K95Diseases of the digestive system
SectionK90-K95Other diseases of the digestive system
CategoryK90Intestinal malabsorption
This CodeK90.821Short bowel syndrome with colon in continuity

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Short bowel syndrome with colonic continuity

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Syndrome
      • short
        • bowel
          • with
            • colon in continuity
    • Syndrome
      • short
        • bowel
          • with
            • ileocolonic anastomosis

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR DIG025
Other specified and unspecified gastrointestinal disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Short Bowel Syndrome

    a malabsorption syndrome resulting from extensive operative resection of the small intestine, the absorptive region of the gastrointestinal tract.

  • Short Bowel Syndrome

    malabsorption that results from the removal of a large segment of the small intestine or, less frequently, from the complete dysfunction of a large portion of the small intestine. signs and symptoms include diarrhea, steatorrhea, and weight loss.

Code History & ChangesHistory

Replacement K90.821 replaces the following previously assigned code(s):

  • K90.89 - Other intestinal malabsorption
FY 2024AddedAdded to the ICD-10-CM code setEffective October 1, 2023.
FY 2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About K90.821Overview

Is K90.821 (Short bowel syndrome) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report short bowel syndrome with colon in continuity on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does K90.821 group to?

When short bowel syndrome with colon in continuity is the principal diagnosis on an inpatient stay, it groups to MS-DRG 391, 392, with relative weights from 0.7796 to 1.2683 depending on complications. Higher weights mean higher Medicare reimbursement.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.